Small bolt vs. Big bolt

Also, not all 73 and up cars have 4.5 bolt pattern. I have a 71 Swinger with 4"BP disc up front. I found a 73 that has disc up front but they are still 4" BP. If your read is 4"BP i would just stick with that. Measure your studs and make sure you get the wheels for that size. Just my .02
Jeff